RacerX--great suggestion on the mineral spirits. I tried it on both intake and exhaust ports and while it is minimal, all four valves in both cylinders are leaking a tiny bit, but under only the pressure of gravity...so I clearly need to get that fixed. Let me give that a try this week and we'll see what happens. Upon further inspection, it is clear that I apparently "cleaned" these in the dark because what is showing in the jpg is definitely not clean. Thanks everyone for the help! I'll update hopefully that it is fixed soon!!!
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